Forming seamless metallic hollow vessels.



No. 857.616; PAIEHTBD JUNE 25. 1907.

J. H. GAULT. FORMING SEAMLESS METALLIC HOLLOW VBSSELS.

-APPLIUATION FILED SEPT.1'7. L904.

' mmsssss; I'IIYENTDR W 7! A m N WW V t M a, I

"ram/En? "UNITED s'rAr JOHN. eAULnor PHILADELPHIA, rEsssrLvANLi, ASSIGNOR TO THE PArENr OF IOE.

- jflNTERNATlONAL SILVER COMPANY, 'A CORPORATION OF NEW JERSEY.

'- I i FORVMING sEAmLEss'mETALuc HOLLOW vssssrs.

To all whom -may concern: f Be it known that I, JOHN H. GAULT, a citi- 'izenIof theUnited States, residing at Philathe followin -l\lb, 8 57,616. Specification of Letters latent. Patented June 25, 1907.

Applicatinn'filed' September-17,1904. SerielNo. 224,861, I

delphia, countyof Philadelphia, and State of ennsylvania, have invented a new and use provement in Methods of l onnin Seamless Metallic Hollow Vessels, of which is a full, clear, and exact description, re ere'nce-being had to the accompanying drawings, which form a port of this I specification.

The object of my invention is to produce a lun'itary metallic hollow vessel homing con- .tr'acted and expanded portions.

' S eaking generally, I

I will first describe my improved methmil. first form a hollow b ank and then contract one portion thereof and then expand the remainder or a portion thereof.

1- In the drawings illustrating my method and article, Figure i is a sectional view of a blank and a die, also central supporting c l indcr. Fig. 2 is a sectional view showing a step in the contract-in operation. Fig. 3 shows another step in t e contracting operation. 4 1s a sectional view showing the blank in t e mold and one step in expansion of been Fr expanding of metal.

5 shows another step in the enk. Fig. 6 shows the final expanding. Fig. 7 shows a plan View of the le ucing die and control cylinder. Fig. 8 shows a; blank ready for treatment, Fig. 9

shows a finished vessel made from the blank. I

prising enlarged and. contracted. portions can 1 form a hollow blank (2, Fig.8, in the ordinary and. Well known manner, from. a sheet of (Due portion of this blank is thicker than he other portion. One end of this blank, the end to be contracted, the end in which the metal is thinner, is then forced successively through the dies B, B, B.

In Figs. 1 9 end 3, C is a cylinder ol' width or diameter substantially equal to the space between the wells of the die, less the thickness of the metal to be treated, at the point of maximum desired contraction in any one die. By successive actions, 1 form a contracted portion D with the desired amount of contraction. The partially formed vessel is then surrounded-by the two part mold E,

having the contracted portion e of width sub- I stantially e ual to the width of the contractcd portion of the vessel and with an on.- larged ortion of the desired shape of the expanded portion of the vessel. After the mold sections are securely locked together with the partially formed vessel between them an expander is forced against the inner well of the partially formed vessel, partially expending 1t. As this expander acts upon that portion of the blank which, as stated before, is of greater thickness than the remain l der of the blank, the metal will better resist l stretch under the expanding action and if l stretch does occur there will not be a reducl tion of the thickness of the metal at-that i point beyond that ol the remainder of the i 'essclthis treatment of the artially formed vessel, it is removed from tlio mold, the metal treated. and. the vessel again replaced in the mold and the last action repeated. This action and treatment is repeated successivcly until the expandingaction is suflicient to cause the-metal at the point where v the expanding action takes place to conform to the walls of the mold. In Figs. 4, 5, and 6, these successive'actions are shown. The difference in thickness between the two ortions of the blank, as before described, is but slight. in practice, I have found a thickness for the thinnest part of the blank of .040 and for the thicker part of the blank of .047 to be good working thicknesses. It is impossible to show this slight difference in thickness without exaggeration in the drawing and in the drawings 1 have shown this exaggent-ed.

, Metallic articles. of the shape shown, com- I I r I readily be made, by my method, in a unitary i structure by the successive actions of first f contracting one portion. and then expanding the other portion, the desired action upon 3 the metal may be obtained without stretchmg metal. Further, by using, the cylindcr (f, l support the vessel at the point of contraction both within. and without.

tion of the specific article shown in Fig. 9,

I production cl such a specific article.

{ Having now fully described my invention, what I claim and desire to protect by Letters Patent is 1.. The hereinbefore described method of formin a. seamless hollow unitary metallic vessel, having a portion of greater and a portion. of lesser cross section, which consists in first forming a hollow blank, then reducing nor do I. intend lO llIl'lll, my method. to the- I do not limit .niysel'feither to the produci the cross section of one portion only, and then expanding, in cross section, by internal action, a part or the whole ofthe remainder of the blank.

2. The hereinbefore described. method of forrniiii a seamless hollow unitary metallic vessel, 'ia'vin r a contracted. and an expanded portion, W hie '1 consists in 1 irst forming holow blank, then forcing said blank. at the open. end partially through a die to mntract it and supporting the interior of said blank,

during sald action, at the portion to be con traeted, then expanding a part or the Whole of the remainder of the blank.

3. The hereinbefore described method of forming a vessel of the character described, which consists in first forming a hollow blank,

" then contracting a portion only of said blank,

r then surrounding said blank by a mold, one

portion of which conforms to the contracted portion of the blank, and the other portion of which is larger thanthezremaindr of the blank and expanding said last mentioned portion of the blank.

4:. The hereinbefore described method, which consists in iorrn'in a hollow metallic blank, the metal atone p: tion being thicker than the remainder of the blank and expand-- ing in cross section the Whole or a art of the portion of the blank having t is thicker 'Inet'al.

' vessel, having a neck portion and a body or tion, which consists in first forming a ho low;

blank of uniform cross'section in both that part thereof corresponding to the neck, and that part thereof corresponding to the body, of the vessel to be formed, then applying" eX- ternal reducing pressure to that part on T of the blank corresponding to the neck of the wessel to be formed, thereby forminga fiartly shaped blank having a body portion of uniemg'e 16 '7. The l'ieroinbeforc described niethodofl.

forming a seamless hollowunitary metallic vessel,

aving a neck portion and a body or tion, which consists in first forming a ho ow;

blank, then drawing a part only thereofi through a reducing die for a distance sub stantially exceeding the depth of the die and siinultaneously supporting the part subjected to the reducing action and then expanding, in cross-section, by internal action, a partor the Whole of the remainder of the blank.

The hereinbefore described method of formin r a seamless hollow unitary metallic vessel, lining a neck portion and a body ortion, which consists in first forming a hol ow blank, then drawing a part only of the blank through a plurality of diesel successively de -creas1ng diameters, and then expanding, 111

cross section, by internal action, apart or the Whole of that part of the blank which has not been subjected to the reducing action.

9. The hereinbefore described method of forniin a seamless hollow unitary metallic vessel, raving a neck. portion and a body 01' tion, which consists in first forming a ho low blank of nnifonn-cross-section in both that part thereof corresponding to the neck, and that part thereof corresponding to the body, of the vessel to be formed, then drawing a part only of the blank througha plurality of dies of successively decreasing diameters, thereby forming a blank having a body portion. of uniform dross-section and a cylindrical neck portion of uniform but smaller cross-section, and then expanding, 'in' crosssection, by internal action, the body portion of the blank.

In testimony of which invention, I have hereunto set my hand, at Philadelphia-ion this eighth day of September,- 1904.

\ I onurr. otters.

Witnesses: i

M. M. HAMrgToN, W. I. Rurrne, Jr. 

